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repeated bout effect

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https://www.readbyqxmd.com/read/29782040/two-repetitive-bouts-of-intense-eccentric-concentric-jaw-exercises-reduce-experimental-muscle-pain-in-healthy-subjects
#1
Rosaria Bucci, Frank Lobbezoo, Ambrosina Michelotti, Michail Koutris
BACKGROUND: High-intensity eccentric-concentric contractions of the jaw-closing muscles induce muscle soreness, fatigue, and functional impairment of the jaw, resembling the symptoms of myalgia, according to the Diagnostic Criteria for Temporomandibular Disorders (DC/TMD). However, it is claimed that repetition of similar exercises can minimize these detrimental effects. OBJECTIVE: This study aimed to evaluate the response of jaw closing muscles following two series of intense eccentric-concentric exercises of the masticatory muscles in healthy subjects...
May 21, 2018: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/29781933/repeated-exposure-to-taekwondo-combat-modulates-the-physiological-and-hormonal-responses-to-subsequent-bouts-and-recovery-periods
#2
Craig A Bridge, Andy S Sparks, Lars R McNaughton, Graeme L Close, Matheus Hausen, Jonas Gurgel, Barry Drust
Bridge, CA, Sparks, SA, McNaughton, LR, Close, GL, Hausen, M, Gurgel, J, and Drust, B. Repeated exposure to taekwondo combat modulates the physiological and hormonal responses to subsequent bouts and recovery periods. J Strength Cond Res XX(X): 000-000, 2018-This study examined the physiological and hormonal responses to successive taekwondo combats using an ecologically valid competition time structure. Ten elite male international taekwondo competitors (age 19 ± 3 years) took part in a simulated championship event...
May 17, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29757051/weight-regain-but-not-weight-loss-is-related-to-competitive-success-in-real-life-mixed-martial-arts-competition
#3
Victor Silveira Coswig, Bianca Miarka, Daniel Alvarez Pires, Levy Mendes da Silva, Charles Bartel, Fabrício Boscolo Del Vecchio
We aimed to describe the nutritional and behavioural strategies for rapid weight loss (RWL), investigate the effects of RWL and weight regain (WRG) in winners and losers and verify mood state and technical-tactical/time-motion parameters in Mixed Martial Arts (MMA). The sample consisted of MMA athletes after a single real match and was separated into two groups: Winners (n=8, age: 25.4±6.1yo., height: 173.9±0.2cm, habitual body mass (BM): 89.9±17.3kg) and Losers (n=7, age: 24.4±6.8yo., height: 178.4±0...
May 14, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29727016/metabolic-stress-dependent-regulation-of-the-mitochondrial-biogenic-molecular-response-to-high-intensity-exercise-in-human-skeletal-muscle
#4
M Fiorenza, T P Gunnarsson, M Hostrup, F M Iaia, F Schena, H Pilegaard, J Bangsbo
KEY POINTS: Low-volume high-intensity exercise training promotes muscle mitochondrial adaptations that resemble the ones associated with high-volume moderate-intensity exercise training. These training-induced mitochondrial adaptations stem from the cumulative effects of transient transcriptional responses to each acute exercise bout. However, whether metabolic stress is a key mediator of the acute molecular responses to high-intensity exercise is still incompletely understood. Herein we show that, by comparing different work-matched low-volume high-intensity exercise protocols, more marked metabolic perturbations were associated with enhanced mitochondrial biogenesis-related muscle mRNA responses...
May 4, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29696309/persistent-escalation-of-alcohol-consumption-by-mice-exposed-to-brief-episodes-of-social-defeat-stress-suppression-by-crf-r1-antagonism
#5
Emily L Newman, Lucas Albrechet-Souza, Peter M Andrew, John G Auld, Kelly C Burk, Lara S Hwa, Eric Y Zhang, Joseph F DeBold, Klaus A Miczek
RATIONALE: Episodic bouts of social stress can precede the initiation, escalation, or relapse to disordered alcohol intake. Social stress may engender neuroadaptations in the hypothalamic-pituitary-adrenal (HPA) axis and in extrahypothalamic stress circuitry to promote the escalation of alcohol intake. OBJECTIVES: We aimed to (1) confirm a pattern of escalated drinking in socially defeated mice and to (2) test drugs that target distinct aspects of the HPA axis and extrahypothalamic neural substrates for their effectiveness in reducing murine, stress-escalated drinking...
June 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29681228/driving-in-an-urban-environment-the-stress-response-and-effects-of-exercise
#6
Michael Antoun, Ding Ding, Erika E Bohn-Goldbaum, Scott Michael, Kate M Edwards
Driving may be detrimental to health, with one hypothesis suggesting that driving may elicit an acute stress response and, with repeated exposures, may become a chronic stressor. The present study examined the stress response to driving and the effectiveness of a prior exercise bout in dampening this response. Twenty healthy adults performed three tasks: control, driving and exercise plus driving. Heart rate (HR), heart rate variability (HRV), blood pressure (BP) and cortisol were measured to quantify the acute stress response to each condition...
April 23, 2018: Ergonomics
https://www.readbyqxmd.com/read/29595913/past-injurious-exercise-attenuates-activation-of-primary-calcium-dependent-injury-pathways-in-skeletal-muscle-during-subsequent-exercise
#7
Ryo Takagi, Riki Ogasawara, Junya Takegaki, Yuki Tamura, Arata Tsutaki, Koichi Nakazato, Naokata Ishii
Past contraction-induced skeletal muscle injury reduces the degree of subsequent injury; this phenomenon is called the "repeated bout effect (RBE)." This study addresses the mechanisms underlying the RBE, focusing on primary calcium-dependent injury pathways. Wistar rats were subdivided into single injury (SI) and repeated injury (RI) groups. At age 10 weeks, the right gastrocnemius muscle in each rat in the RI group was subjected to strenuous eccentric contractions (ECs). Subsequently, mild ECs were imposed on the same muscle of each rat at 14 weeks of age in both groups...
March 2018: Physiological Reports
https://www.readbyqxmd.com/read/29565685/acute-effects-of-repeated-bouts-of-aerobic-exercise-on-arterial-stiffness-after-glucose-ingestion
#8
Ryota Kobayashi, Yuto Hashimoto, Hiroyuki Hatakeyama, Takanobu Okamoto
The aim of this study was to investigate the acute repeated bouts of aerobic exercise decrease leg arterial stiffness. However, the influence of repeated bouts of aerobic exercise on arterial stiffness after glucose ingestion is unknown. The present study investigates the acute effects of repeated bouts of aerobic exercise on arterial stiffness after the 75-g oral glucose tolerance test (OGTT). Ten healthy young men (age, 23.2 ± 0.9 years) performed repeated bouts of aerobic exercise trial (RE, 65% peak oxygen uptake; two 15 min bouts of cycling performed 20 min apart) and control trial (CON, seated and resting in a quiet room) at 80 min before the 75-g OGTT on separate days in a randomized, controlled crossover fashion...
March 22, 2018: Clinical and Experimental Hypertension: CHE
https://www.readbyqxmd.com/read/29549745/exploring-the-effects-of-mental-and-muscular-fatigue-in-soccer-players-performance
#9
Diogo Coutinho, Bruno Gonçalves, Del P Wong, Bruno Travassos, Aaron J Coutts, Jaime Sampaio
This study examined the effects of induced mental and muscular fatigue on soccer players' physical activity profile and collective behavior during small-sided games (SSG). Ten youth soccer players performed a 5vs5 SSG under three conditions: a) control, playing without any previous activity; b) muscular fatigue, playing after performing a repeated change-of-direction task; c) mental fatigue, playing after completing a 30 min Stroop color-word task. Players' positional data was used to compute time-motion and tactical-related variables...
April 2018: Human Movement Science
https://www.readbyqxmd.com/read/29535576/skeletal-muscle-estrogen-receptor-activation-in-response-to-eccentric-exercise-up-regulates-myogenic-related-gene-expression-independent-of-differing-serum-estradiol-levels-occurring-during-the-human-menstrual-cycle
#10
Mackenzie Haines, Sarah K McKinley-Barnard, Thomas L Andre, Josh J Gann, Paul S Hwang, Darryn S Willoughby
This study sought to determine if the differences in serum estradiol we have previously observed to occur during the mid-follicular (MF) and mid-luteal (ML) phases of the female menstrual cycle could be attributed to estrogen-induced receptor activation and subsequent effects on myogenic-related genes which may otherwise impact muscle regeneration in response to eccentric exercise. Twenty-two physically-active females (20.9 ± 1.4 years, 63.5 ± 9.0 kg, 1.65 ± 0.08 m) underwent an eccentric exercise bout of the knee extensors during the MF and ML phases of their 28-day menstrual cycle...
March 2018: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29533726/immersion-with-menthol-improves-recovery-between-two-cycling-exercises-in-hot-and-humid-environment
#11
Kévin Rinaldi, Than Tran Trong, Florence Riera, Katharina Appel, Olivier Hue
Endurance exercise performance is impaired in a hot and humid environment. This study compared the effects of cold water immersion, with (CMWI) and without (CWI) menthol, on the recovery of cycling performance. Eight heat-acclimatized cyclists (24.1 ± 4.4 years; 65.3 ± 5.2 kg) performed two randomized sessions, each consisting of a 20-min cycling trial (T1) followed by 10 min of immersion during recovery and then a second 20-min cycling trial (T2). Mean power output (PO) and perceived exertion (RPE) were recorded for both trials...
March 13, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29528955/effects-of-small-sided-games-and-high-intensity-interval-training-on-aerobic-and-repeated-sprint-performance-and-peripheral-muscle-oxygenation-changes-in-elite-junior-basketball-players
#12
A Delextrat, M Gruet, F Bieuzen
The aim of the current study was to compare the effects of 6 weeks of small-sided game (SSG) and high-intensity interval training (HIIT) on aerobic fitness and muscle oxygenation during a repeated sprint (RS) sequence in elite male junior basketball players. Twenty participants (14.3 ± 0.5 years; 176.8 ± 12.5 cm; 74.5 ± 9.8 kg) performed pre- and post-tests interspersed by 6-weeks of SSG or HIIT training. Testing sessions consisted of the 30-15 Intermittent Fitness Test and a RS sequence (two bouts of 15-s)...
March 6, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29511660/sprint-interval-training-on-the-vertical-treadmill-improves-aerobic-and-anaerobic-running-performance
#13
Alastair Ross Jordan, David Claxton, Alison Purvis, Andrew Barnes, Mary Fysh
The vertical treadmill (VertiRun) is an unresearched mode of exercise where users engage in a "running-like" action whilst body weight is supported by a recumbent bench and overhanging resistance cables are tethered to the user's ankles. The purpose of this study was to determine the effects of training on a VertiRun and any cross-training effect on running performance. Thirty active males (age, 22±4 years; stature, 1.79±0.08 m; body mass, 78.5±12.6 kg) volunteered for this study. Participants' aerobic and anaerobic running performance were determined by incremental maximum rate of oxygen consumption (VO2max) treadmill test and a maximum anaerobic running test (MART), respectively...
February 2018: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29511026/reduced-nonexercise-activity-attenuates-negative-energy-balance-in-mice-engaged-in-voluntary-exercise
#14
Daniel S Lark, Jamie R Kwan, P Mason McClatchey, Merrygay N James, Freyja D James, John R B Lighton, Louise Lantier, David H Wasserman
Exercise alone is often ineffective for treating obesity despite the associated increase in metabolic requirements. Decreased nonexercise physical activity has been implicated in this resistance to weight loss, but the mechanisms responsible are unclear. We quantified the metabolic cost of nonexercise activity, or "off-wheel" activity (OWA), and voluntary wheel running (VWR) and examined whether changes in OWA during VWR altered energy balance in chow-fed C57BL/6J mice ( n = 12). Energy expenditure (EE), energy intake, and behavior (VWR and OWA) were continuously monitored for 4 days with locked running wheels followed by 9 days with unlocked running wheels...
May 2018: Diabetes
https://www.readbyqxmd.com/read/29477138/yoga-aids-blood-pressure-recovery-after-exposure-of-forehead-to-cold-a-pilot-study
#15
Derek C Monroe, Jianchun Yin, Kevin K McCully, Rodney K Dishman
Context • Hypotension that occurs after a single bout of aerobic exercise also attenuates the vascular response to discrete stressors, an effect that can last for hours. It is unknown whether the hypotensive benefits of traditional exercise extend to alternative forms of mindful exercise, such as yoga, to confer transient protection against neurovascular challenges that increase blood pressure (BP). Objectives • The study intended to examine the effects of acute exercise on neurovascular responses to exposure of the forehead of female yoga practitioners to vasoconstrictive cold (ie, to cold pressor stress)...
February 24, 2018: Alternative Therapies in Health and Medicine
https://www.readbyqxmd.com/read/29473893/restoration-of-muscle-glycogen-and-functional-capacity-role-of-post-exercise-carbohydrate-and-protein-co-ingestion
#16
Abdullah F Alghannam, Javier T Gonzalez, James A Betts
The importance of post-exercise recovery nutrition has been well described in recent years, leading to its incorporation as an integral part of training regimes in both athletes and active individuals. Muscle glycogen depletion during an initial prolonged exercise bout is a main factor in the onset of fatigue and so the replenishment of glycogen stores may be important for recovery of functional capacity. Nevertheless, nutritional considerations for optimal short-term (3-6 h) recovery remain incompletely elucidated, particularly surrounding the precise amount of specific types of nutrients required...
February 23, 2018: Nutrients
https://www.readbyqxmd.com/read/29466393/the-effect-of-low-and-high-intensity-cycling-in-diesel-exhaust-on-flow-mediated-dilation-circulating-nox-endothelin-1-and-blood-pressure
#17
Luisa V Giles, Scott J Tebbutt, Christopher Carlsten, Michael S Koehle
INTRODUCTION: Exposure to air pollution impairs aspects of endothelial function such as flow-mediated dilation (FMD). Outdoor exercisers are frequently exposed to air pollution, but how exercising in air pollution affects endothelial function and how these effects are modified by exercise intensity are poorly understood. OBJECTIVES: Therefore, the purpose of this study was to determine the effects of low-intensity and high-intensity cycling with diesel exhaust (DE) exposure on FMD, blood pressure, plasma nitrite and nitrate (NOx) and endothelin-1...
2018: PloS One
https://www.readbyqxmd.com/read/29453755/effect-of-nicotine-on-repeated-bouts-of-anaerobic-exercise-in-nicotine-na%C3%A3-ve-individuals
#18
Robert Johnston, Melissa Crowe, Kenji Doma
PURPOSE: Nicotine is a psychostimulant that is reported to be commonly supplemented by athletes. The purpose of the current study was to determine the effects of a rapidly absorbed form of nicotine on repeated bouts of anaerobic exercise, perception of exertion and a range of cardiovascular variables while monitoring side effect profiles. METHODS: Sixteen healthy, nicotine naïve male athletes (24.1 ± 5.3 years, 179.0 ± 8.8 cm, 81.7 ± 13.5 kg, BMI 25...
April 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29451991/exogenous-ketone-salts-do-not-improve-cognitive-responses-after-a-high-intensity-exercise-protocol-in-healthy-college-aged-males
#19
Hunter S Waldman, Steven A Basham, Ffi G Price, JohnEric W Smith, Harish Chander, Adam C Knight, Ben M Krings, Matthew J McAllister
This study examined the effects of a D-ß-hydroxybutyrate (ßHB) containing beverage on cognitive and performance measures during a bout of repeated Wingates. Fifteen healthy, college-aged males (mean ± SD age: 23.1 ± 2.4 years, height: 165.4 ± 2.0 cm, mass: 81.4 ± 9.2 kg) volunteered for the present study. Trial 1 consisted of baseline measures and familiarization for the protocol. During trials 2 and 3, subjects reported to the laboratory, after a 10 h fast, and ingested 11.38 grams of ßHB or a placebo (PLA) beverage 30 min before exercise...
February 16, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29444412/heart-rate-variability-responses-to-acute-and-repeated-post-exercise-sauna-in-trained-cyclists
#20
Anthony S Leicht, Aaron Halliday, Wade H Sinclair, Shaun D'Auria, Martin Buchheit, Glen P Kenny, Jamie Stanley
Short- to medium-term (i.e. 4-14 days) heating protocols induce physiological adaptations including improved cardiac autonomic modulations, as assessed using heart rate variability, which may contribute to greater exercise performance. Whether similar cardiac autonomic changes occur during an intense heating protocol (sauna) reported to increase plasma volume in athletes remains to be confirmed. This study examined the changes in heart rate and its variability during a single, extreme heat (sauna) exposure and repeated exposures in athletes...
February 14, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
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